Congratulations, Tex! I went vegetarian rather abruptly six years ago and have never looked back.
Protein: in the modern Western world, getting enough protein is not an issue. Just make sure to eat something with whole grains and something with beans daily. If you are concerned about it because you work out, may be a site where you can get some good information.
Iron: You can get iron from spinach and other dark green and leafy vegetables. Eat plenty of broccoli, Brussels sprouts, and other greens (like kale and chard and beet greens) and you'll be fine. Claims about spinach not containing much iron are exaggerated. Spinach contains non-heme iron, which is not as easily absorbed by the body as heme iron (found in animals), but the difference is not great enough to worry about as long as you are eating an otherwise balanced diet.
Eggs and dairy: That's a personal choice. I don't use animal milk because I lost my taste for it (separately from becoming a vegetarian), so I usually use almond or soy milk. On th other hand, I still eat cheese and occasionally eat eggs.